10
9
FURTHER INSPECTIONS
It is important to check top and bottom hooks for proper opening
and other signs of deformation or damage. Replace a hook imme-
diately if any of t following problems are identified:
• The safety latch no longer contacts the hook opening.
• The vertical angle at the neck of the hook reaches 10°, see (FIG 3).
• Chemical corrosion or cracks on the hook.
• Excessive wear on the inside surface.
• The throat opening has enlarged. See (FIG 13) for the maximum
allowable limits for the throat opening.
• A chain stop must be attached to the second-to-last link on the
slack end of the chain. See (FIG 1) for an example. Do not operate
the hoist with a twisted, kinked or damaged chain. Do not splice
the chain.
• Check that the chain does not twist along its length from hoist to hook.
• Replace the chain if links are stretched too long or seriously worn
on the surface, especially at the points where links contact each other.
See “Allowable Limits” on page14 for measuring chain elongation.
• Do not use a chain that is seriously rusted or cracked.
• Periodically apply a light coat of 30-weight oil to the chain. This
will create easier operation and prolong the chain’s life. For optimum
results, clean the chain with an acid-free solution before oiling.
• Never extend load chain by welding a second piece to the original.
INSPECTING THE HOOK
• With the lever in the up position, while pulling down on the chain
or with a load connected, check for a clicking sound when the
handle is rotated in a clockwise direction. If these sounds are not
present, or if irregular clicking noises develop, do not use the hoist –
have it inspected and repaired by an authorized service center.
• With the lever in the up position, check free play in handle
rotation. Free play is measured by the distance the handle travels
before resistance or gearing is felt. If free play has reached 3/4 of
a turn, brake discs are worn and should be replaced by a Sumner
authorized service center.
• The brake mechanism must be kept clean and free from dirt,
water, and oil. Never allow oil to penetrate the braking mecha-
nism. The brake should not slip while using the hoist.
• If the lever hoist has not been used for an extended period,
check for proper operation before putting into service.
OPERATION
The LH Lever Hoist may be used either in vertical position as a hoist;
or in angled or horizontal position as a puller. Below is the general
procedure for operating the hoist:
• Set the top hook securely.
• Correctly center the load on the bottom hook (FIG 4). Incorrect
loading is dangerous to the operator, the lever hoist, and the load.
• Never load the hook in front of the safety latch (A, FIG 5).
• Never load the hook tip (B, FIG 5).
• Never load the hook off the centerline (C, FIG 5).
• Never load the hook sideways (D, FIG 5).
FIG 3
FIG 4
FIG 5
WARNING:
Do not attempt repair of the hook by heat treating,
bending or attaching anything by welding. Doing so will weaken and
may cause failure of the hook.
